docs: def gfstep(time):
      """
      Return the time step set by the most recent call to :func:`gfsstp`.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/gfstep_c.html
  
      :param time: Ignored ET value.
      :type time: float
      :return: Time step to take.
      :rtype: float
      """
      time = ctypes.c_double(time)
      step = ctypes.c_double()
      libspice.gfstep_c(time, ctypes.byref(step))
      return step.value